[gdal-dev] An error in building overviews for

[Even Rouault]

Actually, the HFA driver *does* support overviews. It isn't obvious why it 
does not work for you. Perhaps you should consider upgrading to a newer GDAL 
version, but I don't think this is an issue with GDAL 1.5.2. Does gdaladdo 
work on the dataset ? If so, then it must be rather related to something wrong 
in your code. The "int[] pOverviewList = { overView*2}" is a bit strange, but 
it is difficult to know without more context.

Le jeudi 11 novembre 2010 08:00:15, Chaitanya kumar CH a écrit :
> Zhenyu,
> 
> GDAL's HFA driver doesn't support creation of overviews. It can only read
> them.
> 
> On Thu, Nov 11, 2010 at 9:16 AM, Zhenyu Lu <luzhenyu1981 at gmail.com> wrote:
> > Hi, all:
> > I'm having an error while using function Dataset.BuildOverviews in my
> > code. The error message is "BuildOverviews() not supported for this
> > dataset". However, when I used the ".tif" file the BuildOverviews worked
> > just fine. The
> > code is:
> > int[] pOverviewList = { overView*2};
> > int[] pBandList = new int[dataset.RasterCount];
> > int err = dataset.BuildOverviews("NEAREST", pOverviewList);
> > if (err != (int)CPLErr.CE_None)
> > 
> >       return null;
> > 
> > I'm using GDAL1.5.2 and C#2.0. Is it because the HFA driver doesn't
> > support overview? Or is it a bug? Can anyone pointed out where is my
> > problem? Thanks a
> > lot!
> > --
> > Zhenyu Lu
> > SUNY-ESF
> > 
> > 
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